Screen icon John Travolta made a surprise appearance at a "Grease" sing-a-long at the Hollywood Bowl this weekend.

John Travolta, who starred as 'Grease' bad boy heartthrob Danny Zuko, crashed the Hollywood Bowl's sing-along event Friday.

Not even the cast," the actor said on Instagram after the moment John Travolta surprised fans when he attended a Grease ...

John made his first ever re-appearance in character as Danny alongside the beloved actress in December 2019, when the pair ...

Fans at the 'Grease' Sing-A-Long screening at the Hollywood Bowl last night got a surprise when the original Danny Zuko ...

The clip showed the “Pulp Fiction” alum walking out as the crowd went wild before Travolta joined his stunned “Grease” ...

The actor was joined by costars Barry Pearl, Michael Tucci, Kelly Ward and Didi Conn at the Hollywood Bowl ...

The Hollywood Bowl’s Grease sing-a-long event was automatic, systematic, hydromatic and grease lightning — thanks to a very ...

John Travolta made a surprise appearance at Friday night’s “Grease” sing-a-long at the Hollywood Bowl dressed as his iconic ...

John Travolta gave "Grease" fans the thrill of their lives when he dressed up as Danny Zuko for a surprise appearance at a ...

John Travolta is tapping into our nostalgia. The actor, 71, made a surprise appearance at Friday’s “Grease” sing-a-long at ...

Grease fans got a a big surprise at the Hollywood Bowl last night, where they gathered for a special sing-a-long of the ...